According to the live counter on DOTA 2's "Compendium" site, the current prize pool for this years competitive tournaments has risen to nearly 4.5 million USD. According to the site, for each Compendium purchased, $2.50 is placed in the prize pool.
Contribute to The International's overall prize pool while making tournament predictions and earning rewards as the total reaches each stretch goal. This year, you’ll earn even more rewards as you level up your Compendium by watching games, collecting player cards, and more. It’s the next-best thing to being there.
As the amount of Compendium purchases rise, so does the prize pool but players also receive various benefits including chat emoticons, a special edition HUD, a new game mode, new loading screens and more.
Read more about the DOTA 2 prize pool and Compendium perks.